A few years back there was some eco-warrior protest outside trying to stop the lorries going in. Not really sure what they were trying to achieve with that as it seemed counter to their aims.
The eco-warrior types protesting the pipeline probably think that they're reducing the use of oil. But they haven't thought it all the way through.
In today's dollars (adjusted for inflation) the US average gas price stayed below $2.75/gal from roughly 1986-2002. Then they broke through that barrier, only ever going below it again for two brief moments in 2016 and in 2020. Most of the time since, they've been well above $3.50, and above $4 sometimes. [1]
If you're right that demand for gasoline is highly elastic, meaning people adjust their demand in response to price, then since gas prices got much more expensive, we should expect that gas usage decreased. Have we seen this? (No. [2]) Of course we haven't, because somewhere between 63-67% of people in the US and Canada live in car-dependent suburbs.[3] These cities and towns, in addition to most rural areas, are fundamentally car-dependent and cannot function without daily car use by a majority of residents. The only way for our society to consume less gasoline would be mass electrification of private transport.
And notably, even the recent increased popularity of EVs in the post-Model-3 era isn't manifesting in the data [2] in the form of decreased consumption to my eyes. Perhaps for every new BEV out there not using gas, five people traded the cars they used to drive for inefficient, huge SUVs.
1. https://www.inflationtool.com/adjusted-prices/us-gasoline
2. https://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=pet&s=w...
Or a train derailment destroying the town. https://en.wikipedia.org/wiki/Lac-M%C3%A9gantic_rail_disaste...
https://apnews.com/article/keystone-oil-pipeline-leaks-spill...
They didn't want an ecological disaster in their back yard, they didn't want their religious sites disturbed, and they didn't want there to be a risk that their water ends up contaminated with oil, and the pipeline company didn't want to pay the cost to navigate around the reservation.
So of course the government stepped in and forced the protesters to accept the pipeline and now idiots that don't understand the reasoning behind the protest mock them after the fact.
https://en.wikipedia.org/wiki/Dakota_Access_Pipeline_protest...
I don't think it particularly had a negative connotation until recently though, to me at least it was always just someone who had strong opinions about protecting the environment, and Greenpeace always had quite a lot of support from the general population and they weren't actively disrupting the lives of ordinary citizens in the way Just Stop Oil do for instance.